clear-linux-documentation/source/clear-linux/tutorials/multi-boot/multi-boot-rhel.rst

.. _multi-boot-rhel:

Install Red Hat\* Enterprise Linux 7.4 Beta
###########################################

This guide describes Red Hat-specific details of the :ref:`multi-boot`
tutorial.

#. Start the Red Hat installer and follow the prompts.

#. At the :guilabel:`INSTALLATION SUMMARY` screen, choose
   :guilabel:`INSTALLATION DESTINATION`. See Figure 1.

   .. figure:: figures/multi-boot-rhel-1.png

      Figure 1: Red Hat: Installation summary.

#. In the :guilabel:`Device Selection` section, select a drive on which to
   install the OS. See Figure 2.

   .. figure:: figures/multi-boot-rhel-2.png

      Figure 2: Red Hat: Installation destination.

#. Under the :guilabel:`Other Storage Options` section, choose
   :guilabel:`I will configure partitioning`. See Figure 2.

#. Click :guilabel:`Done`.

#. Under the :menuselection:`New Red Hat Enterprise Linux 7.4 Installation
   --> New mount points will use the following partitioning scheme` section,
   select :menuselection:`Standard Partition` from the drop down list. See
   Figure 3.

   .. figure:: figures/multi-boot-rhel-3.png

      Figure 3: Red Hat: New partition scheme.

#. Create a new root partition.

   #. Click the :menuselection:`+` button on the lower left corner.

   #. Enter `/` and the new partition size. For this example, we specified 45
      GB. See Figure 4.

      .. figure:: figures/multi-boot-rhel-4.png

         Figure 4: Red Hat: Create new root partition.

   #. Click :guilabel:`Add mount point`.

#. Share the swap partition that was created by |CL|. See Figure 5.

   #. Expand :guilabel:`Unknown`.

   #. Select :guilabel:`swap / sda2`.

   #. Select :guilabel:`Reformat`.

   #. Click :guilabel:`Update Settings`.

      .. figure:: figures/multi-boot-rhel-5.png

         Figure 5: Red Hat: Configure swap partition.

#. Share the EFI partition that was created by |CL|. See Figure 6.

   #. Expand :guilabel:`Unknown.`

   #. Select :guilabel:`EFI System Partition / sda3`.

   #. Under :guilabel:`Mount Point`, enter `/boot/efi`.

   #. Click :guilabel:`Update Settings`.

      .. figure:: figures/multi-boot-rhel-6.png

         Figure 6: Red Hat: Configure EFI partition.

#. Click :guilabel:`Done`.

#. Follow the remaining prompts to complete the Red Hat installation.

#. At this point, you cannot boot |CL| because `Grub` is the default boot
   loader. Follow these steps to make the |CL| Systemd-Boot the default boot
   loader and add Red Hat as a boot option:

   #. Boot into Red Hat.

   #. Log in.

   #. Locate the Red Hat :file:`grub.cfg` file in the
      :file:`/boot/efi/EFI/redhat/` directory and look for the primary Red
      Hat :guilabel:`menuentry` section. In Figure 7, the highlighted lines
      identify the kernel and `initrd` filenames, root partition UUID, and
      additional parameters used. Use this information to create a
      new Systemd-Boot entry for Red Hat.

      .. figure:: figures/multi-boot-rhel-7.png

         Figure 7: Red Hat: grub.cfg file.

   #. Copy the kernel and :file:`initrd` file to the EFI partition.

      .. code-block:: bash

         sudo cp /boot/vmlinuz-3.10.0-663.el7.x86_64 /boot/efi

         sudo cp /boot/initramfs-3.10.0-663.el7.x86_64.img /boot/efi

   #. Create a boot entry for Red Hat. At a minimum, the file must contain
      these settings:

      +---------+---------------------------------------------------+
      | Setting | Description                                       |
      +=========+===================================================+
      | title   | Text to show in the boot menu                     |
      +---------+---------------------------------------------------+
      | linux   | Linux kernel image                                |
      +---------+---------------------------------------------------+
      | initrd  | initramfs image                                   |
      +---------+---------------------------------------------------+
      | options | Options to pass to the EFI program or kernel boot |
      |         | parameters                                        |
      +---------+---------------------------------------------------+

      See the `systemd boot loader documentation`_ for additional
      details.

      The *options* parameters must specify the root partition UUID and any
      additional parameters that Red Hat requires.

      .. note:: The root partition UUID used below is unique to this example.

         .. code-block:: bash

            sudoedit /boot/efi/loader/entries/redhat.conf

      Add the following lines to the :file:`redhat.conf` file:

      .. code-block:: console

         title Red Hat Enterprise Linux 7.4 Beta

         linux /vmlinuz-3.10.0-663.el7.x86_64

         initrd /initramfs-3.10.0-663.el7.x86_64.img

         options root=UUID=30655c74-6cc1-4c55-8fcc-ac8bddcea4db ro
         crashkernel=auto rhgb LANG=en_US.UTF-8

   #. Re-install Systemd-Boot to make it the default boot loader.

      .. note::
         This version of Red Hat does not support `bootctl install`. Perform
         the steps in :ref:`multi-boot-restore-bl` instead.

   #. Reboot.

If you want to install other :abbr:`OSes (operating systems)`, refer to
:ref:`multi-boot` for details.


.. _systemd boot loader documentation:
   https://wiki.archlinux.org/index.php/Systemd-boot